发明名称 |
Method and apparatus for real-time on-off contrast ratio optimization in liquid crystal displays |
摘要 |
An apparatus provides optimal on-off contrast ratio in a liquid crystal display panel. The apparatus includes a capacitive temperature sensing device for sensing the temperature of liquid crystal display pixels and having an output voltage according to an applied input voltage and a sensed temperature;a monitoring device including differentiator and sample and hold circuit for obtaining a peak voltage corresponding to a maximum change of the voltage output from the temperature sensing device; and a device for measuring a difference between the peak voltage with a predetermined reference voltage and outputting a signal representing the difference. Heat is consequently applied to the liquid crystal display panel in accordance with a measured temperature difference. Advantageously, the capacitive temperature sensing device is formed as part of the liquid crystal display element.
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申请公布号 |
US6333728(B1) |
申请公布日期 |
2001.12.25 |
申请号 |
US19980146897 |
申请日期 |
1998.09.03 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
LIBSCH FRANK R.;YANG KEI-HSIUNG |
分类号 |
G02F1/133;G09G3/20;G09G3/36;(IPC1-7):G09G3/36 |
主分类号 |
G02F1/133 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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